Decimal-Acre Reference / Sheet 0.25
0.25 Acres = 10,890 sq ft
A quarter acre, the classic American suburban single-family lot. The math is exact: 0.25 multiplied by 43,560 (the international acre constant since the 1959 IYPA) equals 10,890 square feet, or 1,011.71 square metres.
Enter any acreage to convert. Use the survey foot toggle for pre-2023 federal land descriptions only.
Square Feet
10,890
international ft2
Square Metres
1,011.7
m2
Hectares
0.1012
ha
Derivation: 0.25 acres × 43,560 sq ft per acre = 10,890 sq ft, exactly. The constant 43,560 comes from one surveyor's chain (66 ft) multiplied by one furlong (660 ft), formalised internationally by the 1959 International Yard and Pound Agreement.
Sheet 02 · Scale References
What 10,890 square feet looks like
A quarter-acre parcel laid out as a perfect square measures about 104.4 feet on each side, with a perimeter of roughly 417 feet, a little over a one-minute walk to circle. Most real quarter-acre lots are rectangular rather than square: a common suburban shape is 75 ft wide by 145 ft deep, or 90 ft by 121 ft, sized to give a usable street frontage and a back yard. The total area is what matters, and 10,890 sq ft places this size at the heart of standard American suburban single-family land.
An NBA basketball court
4,700 sq ft
0.25 ac is 2.3× the size
A US doubles tennis court
2,808 sq ft
0.25 ac is 3.9× the size
An American football field (with end zones)
57,600 sq ft
0.25 ac is 19% of it
A US singles tennis court
2,106 sq ft
0.25 ac is 5.2× the size
A standard US parking space
162 sq ft
0.25 ac is 67.2× the size
The most useful comparison is the basketball court: a quarter acre is a little over two NBA courts laid side by side. Against the football field, a quarter acre is just under a fifth of a full field including the end zones, or roughly the stretch from a goal line out to the 23-yard line. The plot is large enough to hold a comfortable detached house with a driveway and a yard on every side, yet small enough that a homeowner can mow it with a push or self-propelled mower in well under an hour. This balance is exactly why the quarter acre became the default lot of the American suburb.
Sheet 03 · What Gets Built on a Quarter Acre
The standard suburban single-family lot
In the United States, the quarter acre is the most familiar single-family lot size in sewer-served suburbs. It comfortably holds a 1,800 to 2,800 sq ft house, a two-car garage, a driveway, and a front and back yard with room for a patio, a few trees, and a small play area. With a typical house footprint of around 1,500 sq ft on the ground, a quarter-acre lot leaves the majority of the parcel open, though the required front, side, and rear setbacks usually shape that open space into a modest usable yard rather than a wide-open expanse.
Where the quarter acre differs from the half acre is the absence of a septic requirement. A quarter-acre lot is too small for a conventional septic tank, drainfield, reserve drainfield, and the mandated setbacks from wells and property lines, so quarter-acre subdivisions almost always connect to municipal sewer. This is precisely why the size is so common in towns and cities with public utilities, and far rarer in the rural and exurban areas where the half acre and one-acre minimums dominate.
Suburban R-1 zoning districts frequently set minimum lot sizes in the 7,500 to 10,000 sq ft range, so a quarter acre at 10,890 sq ft sits comfortably at or above the minimum in most of these districts. The zoning code typically pairs the lot minimum with setbacks (often 20 to 30 ft front, 5 to 10 ft side, 20 to 25 ft rear) and a maximum lot coverage of 30 to 40 percent. A quarter-acre lot with a 35 percent coverage limit can support a building footprint of about 3,800 sq ft, enough for a two-storey house of 2,500 to 3,000 finished square feet with an attached garage.
For a buyer, the most useful framing before relying on a quarter-acre purchase is to confirm the zoning district's minimum lot size and setbacks, the maximum lot coverage, and whether the parcel is already served by municipal sewer and water. Because a quarter acre leaves less slack than a half acre, the setbacks and coverage limits do most of the work in deciding how large a house the lot can actually carry, so they are worth checking before assuming a given floor plan will fit.
Sheet 04 · Why 0.25 Acres Shows Up in Records
Where the number comes from
If you searched ".25 acres to square feet" you almost certainly read it on a property listing, a tax-assessor record, a plat, or a subdivision map. A quarter acre recurs because it is a round, easily understood fraction of the acre and the workhorse lot of the sewer-served American suburb. Several standard lot dimensions land at or near 10,890 sq ft:
- 66 ft by 165 ft (10,890 sq ft, 0.2500 acres): an exact quarter acre, with 66 ft being one surveyor's chain and 165 ft being two and a half chains.
- 90 ft by 121 ft (10,890 sq ft, 0.2500 acres): an exact quarter acre with a wider frontage, favoured for single-storey and ranch homes.
- 75 ft by 145 ft (10,875 sq ft, 0.2497 acres): a deep suburban lot that reports as 0.25 acres on a two-decimal assessor record.
- 80 ft by 136 ft (10,880 sq ft, 0.2498 acres): a common subdivision lot that rounds to a quarter acre on the deed.
All of these round to 0.25 acres on a tax record because most US assessor offices report acreage to two decimal places. A 10,700 sq ft lot, a 10,890 sq ft lot, and a 11,000 sq ft lot all display as "0.25 acres" on a public-record search. If precision matters (for example when calculating price per square foot, or checking a building's lot-coverage ratio against the zoning maximum), pull the recorded plat and use the survey-grade square footage rather than the rounded acreage.
Quarter-acre figures also appear throughout subdivision planning, where a developer dividing raw land into uniform lots can fit four homes per gross acre before streets and easements are deducted. The quarter acre became the default unit of mid-century and later suburban growth precisely because it packed enough density to make municipal sewer and water worthwhile, while still giving each home a detached house and a private yard.
Adjacent Acreage Pages
Nearby acreages
Sheet 05 · Common Questions